Furnace for burning hydrocarbons.



P. o. KELHoLTz. PURNAGE FOR BURNING HYDBOCARBONS.

APPLICATION rILzi Nov. 2e', 1907. G1 5,097' Patented Mar. 16, 1909.

[gran/#r r giver@ I f/M f Y' HornayS PIERRE 0. KEILHOLTZ, BALTIMORE, MARYLAND.

FTJ'RNACE FOR BURNING- HYDROCARBONS.

rre. 915,@97.

To dit whom it muy concern.'

Be it known that I, PIERRE O. citizen of the United States of America, residin at the city of Baltimore, State of Maryzand, have invented certain new andy useful improvements in Enrnaces for Burn-y ing Hydrocarbons, of which the following is a specification. .The present invention relates to furnaces for. burning liquid hydro-oarbons, or ulver` ized coal, particu`larly adapted to t e production of steam, and contemplates the provision of such a furnace in which the fuel is so presented as to give the highest temperature, complete4 combustion g and as a result of these and other features greatly increased economy as compared to other furnaces now in use.

in furnaces of this general type, the fuel and air while in the process of combustion are brought into contact with the heating surface or other conducting members and thereby cooled, so that eornbustion is arrested and rendered incomplete. By this means much fuel is lost and a oarbonaoeous deposit formed by which the tubes are made less capable of transmitting heat. A. feature of my invention designed to overcome these difficulties is a combustion chamber of non-conducting material at the rear of the furnace into which the fuel is sprayed and allowed to expand and burn completely. The products of combustion pass iorward toward the front wall, then rise and corne in contact wit- L the front ends of the tubes. .From this point they are guided back in contact with the heating'surface to the rear of the furnace and finally to the stack. Thus 'we have the products of combustion at their highest temperature in contact with theorition of the tubes from which steam is ta ren, and from that point conducted back as their temperature falls to the rear ends of the tubes into which the waterto be heated is 'first admitted.

My invention has for its object to provide a 'furnace for burning liquid fuel so constructed that a particle of fuel will, whenl projected into the furnace, have a straight ath long enough to insure complete cornbustion, and of such a shape.,as to permit uniform expansion of the gases withoutcobstruction, vcheck or retardation from the tiniifgthey leave the injector nozzle until they reach the extreme end of the chamber.

Speciieation of- Letters Patent. Application are.; ne'mber 2e, 1907. semi sarcasm.

Patented March 1c, 190e.

To thisend, the furnace is constructed in KEILHOLTZ, l the form of a long cone with sides which are constantly diverging from the small inlet/ to the large outlet end. This chamber is" of uniform shape on all sides and may be made parabolic for convenience of structure. yThe ottoni of the chamber is made fla`t,',` but,

theoretically, it would be better if shaped exactly corresponding with the rest `of the interior surface.

Referring to the drav.fings,/-Figure l is a longitudinal vertical cross-section of a water tube boiler in connection with the furnace which constitutes the subject-matter of this invention. Fig. 2 is a transverse cross-sec tion of they furnace taken on the line "1 2 looking toward the rear.

The boiler setting consists of the usual I front wall (1)7 rear wall (2), and side walls (3 and 4). The drum (5) of a water tube boiler rests on the walls and is secured theree to by means well known in the art. Tubes known as rear multiples, extend down` wardlj.' from the rear end of the drum and are ineline'rl sli htly forward. From each multiple a nurnilber of water tubes (7) lead forward and upward at an angle of about 15 and join the front multiples (8) Vwhich enter the bottoni of the drum at the front to the rear multiples. The usua baffle .plates (9 and 10).and baille walls (1] and 12 forward from a point near the rear "ends of the tubes and o ening into the main chamber. transverse cross-section of,v which increases toward the front has at the rear large pipes (16), in this lnstance about 12 inches in diameter, open at their extremities, extending from the combustion chamber through the wall (2)` A pipe (17) conducting tar or any other fuel to be burned leadsfrom a suitable reservoir, not shown, to the pipe (18). This pipe extends forward through' the horizontal pipe v(l') and is shown as tending slightly u ward and terminates'` `in a suitable nozzle 19). v A steam pipe (20)" from any suitable source joins the pipe (18).

The commstion chamber (15), the

The supply of steam and tar is controlled by thovzilvos (21 mul 22) respectively.

ln the operation. ot they furnace steam and tar under rassure are injectedl through the nozzle (19 into tho combustion Chamber (l5) the tar being atomized hy the action of the steam. The. relativo quantities of tho two Substances lira controlled oy the 'vali/os 2l and 22 and the necessary amount of air is drawn into the iuriifioo through tho ipes (16) hy tho :Lotion ol the jet of stoom mi( tar. The nozzle is so disposed :is 'to direct the incoming iuol :Mul steam l'orwliril longitudinally of tho oomliuritiou chamber.y Y

The pressure. under which the fuel mul stoom are supplied is relaxed as they issu@ from the nozzle, :imi combustion und oxpunsion take place tho :will vzipors advance. ll/lieu the furnace luis been in opera-tion for short thus/thu W vils of tho combustion chmubor roach :i nuix imum tomperuiure, which approaches tho tomparzituro of combustion of the luci. By this melius the fuel :md air are raised to zi high tenipomture when admitted; their tomi'irfriituroyinH Creuses as they advance und. rho f* :tra Couv i plotely burned in tholcomhustimi Chamber.

lhe burned gass when. they emerge from E the combustion ohziiullor increase Slightly l in volume 11i the ,uu-arri Chamber mid are ourried by their momentum uml the. vreasuro from behind 'toward the front wail 'where they iro delooid,` und movo upward by couveotioi into the. tuho space, and Contact the forward ouille; or' the hoilvr tuiles. Trio steam is milieu or from this und of' rtho tube@ into the. steam drum und ir is im- 2 gortuutthat the gases at their highest teu1- @taratura should ha brought in contact with til-@tubos it this ,Quit

contoctwith the tubes. As the tviiipoi-zrtiiro of tho ases is roduoed by contmft with the. l

tubea, t ey apuroali 'the roar portion nl rho boiler Where the *Miter enters :rml ilut garras or Products oi combustion, wlmi hey u ai'h their lowest tomporoture are hrought into Contact with the 'tubes holding ihr rarer lnx-t introduced.

Tho hir-lt', (luo to i the stock or zmy'ot 1er suimhle novice, iii-im :i l vtlm *fuses backward, luid. the lmlllv plaines arid .aille 'ivalis serve to direct rhum into 1 Qolmtructed, its sumll oud :iperiviirhii operi und unobstructed 'to allow free passigo of the fuel iu :i straight line and permit its completo combustion before such passage iu arrested.

ln si furnace for liuriiiiig inely divided fusto long, conical ohnmher having-f imperforato Walls operi at both eui'ls, :it the small ond to the air und at the largo to this main chamber of the furuuoo1 moons it the small and for iiijecting iuol and. directing it toward the large oud, the larga 0nd of th@y come being unobstruoted, so as to ierriiit thuI purticlos of fuel when projeotil into tl o illuminer to travel in suhstmitially straight lirios from the point ol: admission to tho point of com loto coniljiusiioii; whore/liv, suhtun-- iifxlly n, l the fu ll is burned iu the ohnmhor.

23, :i l'urnuco having u. mitin rliiuubcr mui u. long conical ':iizuiilior with imporforzito walls, tho hitter oluuuhor hm' its largo oud .fmwaril and opening into the main ohziu'ihor :md exif tiroly uuobstriuitorl, its small euri uporturori 1o :ulmit :iir und melius for iiije-c'ti lool at the Small ond :uid (lii sting it lougitmliunlly of the como.' ll. comhiiiutiou with u water tuho ln Coirihiimtion with the stoom lvoile hoilor, :i urrinoo having a umili @humilier un fior the higher 'portion of the tubos long conical oluiuihor with iiuiioriorzito wills, tho latter cimrlilor howling* its liti-rg0 uml open ing' into the 11min shimmer :imi eiiiraly uno admit injecting of the ziir und means in thosuuiil @mi for i'uel zuid ilirr-tt' ig it lougituilirmily sono toward the. 1go mul.

5. ln n, lui-112m; for homing iiuoly divided furl, :i huw rfoiiizzl-cluizuhor umile ii upon :it ho'h (bulls, ui: the small @url to tho zur nml :it the largo und to thix umm chamber 0l tho l'urim'ro, Dimmi; :1l thuy small i l lor izriorlmg :he iiwl :will chr/outing it, t l'the lauro mul, rho ini-gr or so zw lo poruiit (luf im t rio.

.ici-lod into tho ilmmhor io trawl iu imhstm-A tiulljr si might linux from the point oi' minus* sion to tho point ol' ifouiyliiio c:.irziliuSiiou7 whorohy suhstauuilill f iu the hzuiilmr iii rmitiugt with lioat-rmliit lug suirlros, so fluit the 'uvl rom-hos its liiglf H iilile 'tviiiioriituro before it cum-eri in l, with heut-:ihsorbiug surfzufofx.

llitnossos; y

:lQiiWARD if. Biasi-r, il. li1 LATHAM,

v rolra z'tory iiizlturiul having.; ,uipm'iorzite walls not 'mfr :is hout rcsorvoirs, the chamber honig lill tiro l'uol is hurried 

